Human evolution is the result of gradual changes across a very long period.
Some major developments associated with the human lineage include:
Bipedalism → Tool use → Brain expansion → Fire → Migration → Complex communication → Symbolic culture
These developments did not occur in one simple sequence, and different hominin species had different combinations of physical and behavioral characteristics.

A
seven-stage model can nevertheless provide students with a basic framework for studying human evolutionary history.
The Campus Review explains the stages, characteristics, evidence, and major milestones in an accessible format.
https://thecampusreview.com/stem/7-stages-of-human-evolution/#HumanEvolution #Evolution #Biology #Anthropology